1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.orchestra.lib.jsf;
20
21 import java.util.ArrayList;
22 import java.util.Collections;
23 import java.util.List;
24 import java.util.Map;
25
26 /**
27 * Utility methods for configuring the behaviour of a JSF-based Orchestra installation.
28 *
29 * @since 1.1
30 */
31 public abstract class ConfigUtils
32 {
33 private static final String RH_KEY = ConfigUtils.class.getName() + ".RH";
34
35 static List getRequestHandlers(Map reqScope)
36 {
37 List rhl = (List) reqScope.get(RH_KEY);
38 if (rhl != null)
39 {
40 return rhl;
41 }
42 else
43 {
44 return Collections.EMPTY_LIST;
45 }
46 }
47
48 /**
49 * Can be called from a Filter or similar class in order to registed a
50 * handler that should be run at the start of each request just
51 * <i>after</i> the FacesContext object has been created, and at the end
52 * of each request just <i>before</i> the FacesContext is released.
53 */
54 public static void registerRequestHandler(Map reqScope, RequestHandler rh)
55 {
56 List rhl = (List) reqScope.get(RH_KEY);
57 if (rhl == null)
58 {
59 rhl = new ArrayList(1);
60 reqScope.put(RH_KEY, rhl);
61 }
62 rhl.add(rh);
63 }
64 }